Thelia.] BRYACEiE. 299 



1. T. hirtella, Sulliv. Stems closely creeping, some of 

 them extending beyond the tufts ; branches erect, terete, obtuse : 

 leaves concave, round-ovate, abruptly and narrowly acuminate, 

 slightly decurrent at base, very scabrous on the back with 

 simple incurved papilla?; borders spinulose-dentate above, lobate- 

 ciliate toward the base, all the cilia long, curved up, and more 

 or less dentate ; costa slender, vanishing in the middle ; peri- 

 chsetial leaves numerous, loosely imbricate, the inner oblong- 

 lanceolate, narrowly acuminate, fimbriate in the upper part by 

 long dentate cilia : calyptra dimidiate : capsule thin ; pedicel 

 1 cm. long ; teeth linear, distantly but distinctly articulate, the 

 inner basilar membrane truncate, one third the length of the 

 teeth : spores pale yellow. — Mosses of U. States, 60, and Icon. 

 Muse. 128, t. 80 ; Sulliv. & Lesq, Muse. Bor.-Amer, Exsicc, n. 

 247. Pterigynandruni hirtellum, Hedw. Spec. Muse. 89, t. 17. 

 Hypnum hirtellum, Muell. Syn. ii. 468. 



Hab. Base of trees, jSTortherii and Middle States; not rare and copi- 

 ously fruiting. 



2. T. asprella, Sulliv, Differs from the preceding in its 

 glaucous-green color, the leaves bordered nearly all around by 

 longer cilia, the papillne upon the back bifurcate, not simple and 

 curved, and the teeth longer, with nodose articulations. — 

 Mosses of the IT. States, 60, and Icon. Muse. 129, t. 81. LesJcea 

 asperella, Schimp. in Bryol. Eur. Leskea^ 2. 



Hab. Same as the last, and sometimes found growing with it. 



3. T. robusta, Duby, With mode of growth and habit of 

 T. hirtella., differing in the unilateral very crowded branchlets, 

 the leaves strongly bicostate to above the middle, rarely simply 

 costate, the cells of the areolation elliptical in the middle of the 

 leaves, quadrate on the borders, the lower longer, and all with 

 globose papillae, and in the segments of the inner peristome 

 granulate and obtuse. — Regensb. Flora, Iviii. 284 (1875). 



Hab. Florida {Chajwian, in Herb. Delessert). 



4. T. Lescurii, Sulliv. Closely resembling T. asprella, 

 distinguished by its glaucous-green or whitish color, the stems 

 subfasciculate and more loosely divided in longer branches, the 

 leaves with a shorter acumen, not ciliate-fimbriate on the borders, 

 the papillae of the back cut star-like into three or four lobes, the 

 capsule longer and narrower, on a longer pedicel, the teeth 

 shorter and with less distinctly nodose articulations, and the 



